A film capacitor includes a wound body in which a dielectric film and an electrode film are wound; and a pair of external electrodes provided respectively on a pair of end faces positioned in an axial direction of the wound body. The dielectric film includes an electrode-free portion provided on one end side in a width direction, continuously in a longitudinal direction of the dielectric film. The electrode film has a first projection portion on a surface on the other end side in the width direction, and the first projection portion has a string shape extending in the width direction.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A film capacitor, comprising: a wound body in which a dielectric film and an electrode film are wound; and a pair of external electrodes provided respectively on a pair of end faces positioned in an axial direction of the wound body, the dielectric film including an electrode-free portion provided on one end side in a width direction, continuously in a longitudinal direction of the dielectric film, the electrode film having a first projection portion on a surface on the other end side in the width direction, and the first projection portion having a string shape extending in the width direction, the electrode film further comprising a second projection portion on the surface on the other end side, the second projection portion having a branched shape.
2. The film capacitor according to claim 1 , wherein a plurality of the first projection portions are arranged at predetermined intervals in the longitudinal direction.
3. The film capacitor according to claim 1 , wherein the second projection portion is in contact with the first projection portion.
4. The film capacitor according to claim 3 , wherein a starting point of extension of the second projection portion is a contact region with the first projection portion.
5. The film capacitor according to claim 1 , wherein the second projection portion is crystalline.
6. The film capacitor according to claim 1 , wherein the first projection portion is crystalline.
7. The film capacitor according to claim 1 , wherein a thickness of an end portion on the other end side in the width direction of the electrode film is greater than a thickness of a center portion in the width direction of the electrode film.
8. A combination type capacitor, comprising: a plurality of the film capacitors according to claim 1 ; and at least one bus bar connecting all of the plurality of the film capacitors.
9. An inverter, comprising: a bridge circuit including switching elements; and a capacitance member connected to the bridge circuit, the capacitance member including the film capacitor according to claim 1 .
10. An inverter, comprising: a bridge circuit including switching elements; and a capacitance member connected to the bridge circuit, the capacitance member including the combination type capacitor according to claim 8 .
11. An electric vehicle, comprising: a power supply; an inverter connected to the power supply; a motor connected to the inverter; and wheels driven by the motor, the inverter being the inverter according to claim 9 .
12. An electric vehicle, comprising: a power supply; an inverter connected to the power supply; a motor connected to the inverter; and wheels driven by the motor, the inverter being the inverter according to claim 10 .
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
March 18, 2016
March 31, 2020
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